Paper-making machine



Patented Dec. 11, 1923.

maar

UNITED STATES PATENT orties.

ALFRED ALBERT JUDD, OF IROQUOIS FALLS, ONTARIO, CANADA, ASSGNOR ONE- EALF T0 CHARLES FRANCIS MUPUTAUGH. OF ERGQUOIS FALLS, ONWARO, CANADA.

PAPER-vIAKING BGACHINE.

Application filed March 17, 1922. Serial No. 544,422.

To @ZZ whom t may concern: v

Be it lrnown that I, ALFRED ALBERT JUDD, a subject of the King of Great Britain, residing in Iroquois Falls, in the. District of Temislraming, in the Province of ntario, Canada, have invented certain new and useful Improvements in Paper-Making Machines, f which the following isa specifin cation.

My invention relates to improvements in paper-making machines, and relates more ')articularly'to that class of machine used in the early stages of paper manufacture when the water is being squeezed or pressed out of the pulp, and the object of my invention is to provide improved means substantially automatic in cliaracter, to remove the stock or pulp from the top press roll,

y and to carry the same intermixed with water to suitable pumping means whereby it is utilized in the process of manufacturing paper7 without delay, and without necessity of manual help, and in the following speciication I shall describe. a disclosure within invention, and what I claim as new will be set forth in the claims forming part of this specification. Y

Fig. l is an isometric projection of a conventional form of machine used in making paper in the early stages, showingthe same equipped with my invention, 2 is a vertical cross-section on the line 22, Fig. l, and Fig. 3 is a plan view of a bar hereinafter more particularly yreferred to.

In the drawings, like lcharacters of reference refer to the same parts.

In the process of manufacturing paper especially from pulp, the wet pulp is carried between a series of pairs of press rolls by means of a suitable conveyor, in order to remove surplus moisture therefrom, and during this process frequently the pulp becomes attached to the'top press roll, and it is necessary to remove this material from this roll so that the machine can properly function. A scraper, known in the trade as a doctor,7 is pivotally mounted in association with the top press roll, and one or more attendants are necessary to remove the pulp accumulating on this scraper into a truclr, and when this truck is lilled it is used to convey this pulp to the mixing room for further use.

Now in putting my invention into practice I pivotally mount a hopper in lrelaand B are the top` and bottom press rolls respectively, journalled to rotate respectively in any suitable standards C and D. The roll A is usually made of wood, and the roll B is usually covered with` rubber compound. Between these rolls is passed the conveyor E, which passes over rollers F suitably j ournalled. The conveyor E is of course driven in any suitable manner, and as the driving of this conveyor forms no part of my invention, driving means has not been illustrated. In place Vof the well-known plate-like member upon which the pulp accumulates as removed from the top roll, I use a hopper G, which is p-ivotally mounted to co-act with the top press roll. A. in any suitable n'ianner. The construction disclosed for this purpose com-V prises Va bar H held in' brackets I attached to the lower outer. side of said hopper, and

the ends of this bar are held in the stand-- ards C. A The scraper or .doctor comprises a bar 2 preferably made of wood, and preferably bevelled as shown at 3, and upon referring to Fig. l, it will be seen that the bevelled edge of the said scraper 2 rests upon the top press roll A, which revolves in the direction indicated by arrow. 4i is the lip of the side 5 of the hopper G, which I preferably form an integral part of said side. Between this lip and the scraper 2 I locate a stiflening bar 6, preferably made of angle iron. The flange 7 of this bar 6 is provided with a plurality of open slot-s 8 thus forming a plurality of tongues 9. The ends of these tongues are preferably bevelled as shown at 10. The front edge of the lip i is also preferably bevelled as shown at 1l, although these bevels 10 and ll are not essential. The bars 2 and 6 are coupled to the lip 4 by any suitable means suchV yas nuts and bolts commonly designated 12.

The heads of these bolts rest upon the top of the lip 4;', and the. bolts pass through the slots 8, and extend through the bar 2 and the nuts screwing on these bolts are located under the bar 2 and of course have plenty of clearance with the roll A.

By any suitable means, such as water pipes 13, water is sprayed continuously into the hopper G and consequently the pulp passing into said hopper flows out of the opening 14; in one end of the hopper and into the spout 15l whence it passes into the chute 16 which carries it to a pump, (not shown) which will convey it Yto the screens (not shown).

A water pipe 17 may also be provided to introduce water through the closed end of the hopper so as to longitudinally flush the same.

` This hopper will be preferably inclined to slope towards the opening 14- and so facilitate the passage of the mixed water and pulp into the chute 16.

Though it is not essential to my invenn tion, if desired, I may provide means to regulate the pressure of the scraper` bar 2 upon the roll A. Suitable means for this purpose may comprise a bar 18 notched as shown at 19 to rest upon the ends 2O of the hopper so that the position of this bar may be shifted towards or away from the scraper bar 2. This bar 18 may be adapted to support weights 21, for the purpose set forth.

While I have gone into specific details regarding the construction of the various parts of my invention, it must be understood that the construction illustrated is merely eX- emplary, and is not to be construed in any manner as limiting the scope of my protection as defined in the following claims.

22represents the pulp carried by the conveyor E between the rolls A and B.

It will be observed upon referring espeeially to Figs. 1 and 2, that the side 5 of the hopper slopes from the roll A towards the other side of the hopper, thus providing substantially a trough (t in the bottom of the hopper wherein the pulp and water must collect before these materials pass through the opening 111.

lVhat I claim is:

1. In a paper-making machine, the combination with top and bottom press rolls, and a conveyor suitably mounted and adapted to carry the pulp therebetween, et a hopper adapted to be pivotally mounted, and provided with a scraper adapted to rest upon the said top press roll; means whereby water is passed into said hopper to act as a carrier `for the pulp received thereby, thereout oii, and adjustable weights carried by said hopper, for the purpose speeitied.

2. In a paper-making machine, the eombi nation with top and bottom press rolls, and a conveyor suitably mounted and adapted to Vcarry the pulp therebetween, of a hopper adapted to be pivotally mounted at the lower portion of its outer side, and provided with a sloping inner side; a scraper ren'iovably carried by the upper edge ot said sloping sideand adapted to be held by the weight of said hopper in Contact with said top press roll, adjustable weights carried by said hopper, and means whereby water is passed into said hopper to carry the pulp received thereinto and out of an opening formed in one end of said hopper.

3. In combination a hopper provided with an opening in one end, and having one side formed to slope inwardly; an outwardly extending lip integrally formed with said sloping side; a bevelled scraper, a. sti'ening bar located between said lip and said scraper, and means whereby these parts are removably eoupled together.

ALFRED ALBERT JUDD.

IVitnesses:

DANIEL O. MARA, JAMES L. LA BAR. 

